(r) On master drawings covering equipment shock-tested, which have been found
satisfactory, there shall be indicated the following:
(1) The file number and date of the shock test report and the file
number and date of the bureau or agency concerned letter of
(s) The number and date of the radio noise test report, when a radio noise test is
required (see 6.2), and the file number and date of the Bureaus' concerned
letter of approval.
(t) Audio noise test data, when required (see 6.2), including readings at no load
(except series motors) and full load speeds.
(u) A note identifying the type and class of the applicable Government standard
bearing puller (see Spec. GGG-P-781). If the Government standard
bearing pullers are not suitable, the note shall so state and shall identify
the type, brand and catalog number of a suitable bearing puller.
(v) The following additional insulation data which shall be included on each master
d r a w i n g or - on a separate master drawing previously approved by the bureau
or agency concerned. If the data are shown on a separate master drawing
covering insulation practice for a number of motors, the bureau or agency
concerned drawing of the insulation master drawing shall be referred to on
each applicable motor master drawing. These additional data, together with
the information required by 188.8.131.52 (b) to 184.108.40.206 (1), inclusive, shall
c o m p l e t e l y describe all insulation used, indicating the materials, thickness,
forms, sequence of winding and insulating operations numbers of layers and
amount of overlapping of tape applications, limitations (limiting voltages and
mechanical conditions), treatment schedules (number of dips and class of
varnish used, temperature and duration of baking treatments, vacuum and
pressure employed during impregnation). These additional data shall con -
tain complete detailed information on each type of wound assembly (main
field coils, commutating field coils, armature and commutator assembly)
(1) `Conductor strand and turn insulation.
(2) Coil insulation including slot and end turn insulation of each armature
coil, ground insulation, coil turn separators, coil banding
insulation, and support pads between coils and armature spider or
(3) Commutator insulation, including insulation between bars,
insulation between bars and shell insulation creepage distances.
(4) Sketches for each type of winding, showing a cross-section of the
winding with relative location and identification by piece numbers,
of insulating materials shown.
(5) Other sketches and data as necessary to show method of manufacture
(insulation and forming) of each winding. These sketches shall show
such details as the direction and overlap of the various tape winding~
on strands, conductors, turns and coils, the distance that armature
coil slot insulation and slot armor extend beyond the armature iron,
and the original and final shape of conductors and coils before and
after each insulating process.
(6) Each sketch under (4) and (5) above shall be identified as to the design
of motor and the type of winding. The sketches should Contain a
table of standard and alternate insulating materials, identified by
piece numbers and giving applicable specification.
(7) Method of bringing out and insulating leads from each coil.
(8) Slot sections, showing details of slot wedges, slot armor, coil
s p a c e r s , slot tubes.
(9) Sketches showing in detail how field coils are assembled, insulated
and supported on the pole pieces, insulation between shunt and series
coils, and method of preventing excessive relative motion between
the various conductors and windings when subjected to high-impact